VMCsi & TCsi - Axis Tuning Using Auto Servo Tuning (AST)

Set Manufacture Password.

Archive Current System

Set Manufacture Password.

Set Z-Axis Drive P1460 to 2.0 Nms/rad. If adjusting any other axis, change P1460 to 70% of its original value.

[M] → [Setup] → [Mach Data] → [Drive Parameter]

Press [Drive +] to select AX3:MZ1 (Press [Drive +] twice)

[Search] → 1460 → [OK] → 'Set this Value to 2.0' → [Input]

Save [Current Do]

From the Drive Parameter Screen, [Save/Reset] → [Save] → [Current DO]

Release [E-Stop] to enable drives.

Jog the Z-Axis to a safe tuning position. The center of travel is ideal, but ensure there is approximately 8.0 inches of free movement available for upward and downward movement.

The total travel of the Z-axis (in this case, VMC7si) is 20 inches. Ensure that the Z readout is near the center of the Z-axis travel in this case.

Stay in Jog mode with the feedrate override set just above 0.

From the Drive Parameter Screen, go to [Setup] → [Optim/test].

To clear the previous tuning history, select [Options] → [Clear History] → [Yes].

Set the "HMI Options with AST" as follows: check the first 8 boxes.

Press [OK] → [OK] to confirm.

Select AX3:MZ1, then [Tune].

From the menu, select "Strategy 105. Measure and Retune Speed ctrl," then press [OK].

The position of the axes relative to the active soft limits is displayed. Ensure everything is positioned in a safe location, as the Z axis will move up to 6" in both positive and negative directions during testing.

Once the safe position is set, select [OK].

The following Message will appear. Press [Cycle Start]

Note: When [Cycle start] is actuated, the measurement process begins. The motor moves at a slow constant feedrate and the frequency response is measured. The measurement process can be stopped via the reset key on the MCP or the E-Stop.

There are 4 total automated tuning cycles. Each tuning cycle will require hitting a [Cycle Start] to initiate.

Prelim Speed ctrl. mech. plant. high freq.

Speed ctrl. mech. plant high freq.

Prelim Speed ctrl. mech. plant low freq.

Speed ctrl. mech plant. low freq.

Each tuning cycle will run for approximately 30 seconds, testing travel with different resonant frequencies.

After the 4 steps are completed, the controller review screen appears.

[Accept] to complete the re-tune process.

The following message appears which can be ignored because no changes are made to the position controller.

Click [OK]→[OK] to continue

Re-Tune process is complete. Test Z axis movement to confirm the problem is resolved.

Put the machine in E-Stop

Make a final archive to back up the changed data

Archive Current System

Upload both archives from before and after tuning to the Sharepoint Configs Page. Machines are sorted by type and serial number.

https://southwesternindustriesinc.sharep...